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Geographic Information Systems

GIS (Geographic Information Systems) is often described as "computerized mapping" but it is much more. GIS combines layers of information to provide a better understanding of a geographic area (spatial location). GIS is an exciting, dynamic and rapidly advancing technology of computer software, hardware, data, and personnel used to manipulate, analyze and present information that is tied to a spatial location.  GIS has become an essential part of La Plata County's daily functions.  GIS is used in several of the County's departments including: the County Assessors Office, Planning Department, Office of Emergency Management, Road and Bridge, and Engineering.



You can now view our online mapping service using your tablet or smartphone!  Their mapping interface is has some cosmetic differences, but all the funtioncality of the original map service (which is still available).  Please take some time to familiarize yourself with the tablet/smartphone interface and be sure to email us with any questions you may have.

*IMPORTANT! This Tablet/Smartphone map service is optimized when used with Google Chrome.
Apple Users:  Click here to download the
app for Google Chrome. (You will be asked to for your Apple ID and password to download the free software.)
Android Users:  Click here to download the app for Google Chrome.







Download GIS Datasets

  • GIS layers can be downloaded for free from the La Plata County GIS Department. Projection: NAD 83 Colorado State Plane South, Feet, ESRI Shapefile format.

  • Aerial photography was obtained in 2003 & 2007.  Availability depends on location.  Go to our ArcGIS Server and click "Layers' open the 'Images and Aerial Photos' folder and turn on the "2007 Tile Index" to view the tiles that are available. ($10.00 per tile one sq. mile)

  • Additional Planimetric data may be purchased from the La Plata County GIS Department: 5ft contour lines, hydrolines, hydropolys, structures, geo-referenced tiff images, and roads.


Download ArcExplorer from ESRI

  • ArcExplorer is a lightweight GIS data viewer developed by ESRI. This free software offers an easy way to perform basic GIS functions.
Photo La Plata County scenery